Wireless power transmitters and receivers, and method for permitting a wireless power receiver by a wireless power transmitter

Abstract

An apparatus and method are provided for permitting a wireless power receiver to be charged by a wireless power transmitter. The method includes generating a Power Receiving Unit (PRU) control signal including permission information indicating charging permission for the wireless power receiver; and transmitting the PRU control signal to the wireless power receiver.

The invention claimed is: 
     
       1. A wireless power receiver for receiving charging power from a wireless power transmitter, the wireless power receiver comprising:
 a display; 
 a power receiving circuit configured to wirelessly receive power from the wireless power transmitter; 
 a communication interface; and 
 a controller configured to:
 receive, via the communication interface, a first control signal, including permission information indicating a reason that charging the wireless power receiver is denied, 
 based on the permission information, identify that the permission information included in the first control signal indicates that the wireless power transmitter denies charging the wireless power receiver because a class of the wireless power transmitter does not support the wireless power receiver, and 
 based on the identifying, control the display to display a message indicating that the wireless power transmitter cannot charge the wireless power receiver. 
 
 
     
     
       2. The wireless power receiver of  claim 1 , wherein the permission information comprises a bit value corresponding to a descriptive reason related to the permission information. 
     
     
       3. The wireless power receiver of  claim 1 , wherein the first control signal comprises a Power Receiving Unit (PRU) control signal. 
     
     
       4. A method of a wireless power receiver for receiving charging power from a wireless power transmitter, the method comprising:
 wirelessly receiving power from the wireless power transmitter; 
 receiving, from the wireless power transmitter, a first control signal including permission information indicating a reason that charging the wireless power receiver is denied; 
 based on the permission information, identifying that the permission information included in the first control signal indicates that the wireless power transmitter denies charging the wireless power receiver because a class of the wireless power transmitter does not support the wireless power receiver; and 
 based on the identifying, displaying a message indicating that the wireless power transmitter cannot charge the wireless power receiver. 
 
     
     
       5. The method of  claim 4 , wherein the permission information comprises a bit value corresponding to a descriptive reason related to the permission information. 
     
     
       6. The method of  claim 4 , wherein the first control signal comprises a Power Receiving Unit (PRU) control signal.